Excellent corrosion resistance of P and Fe modified micro-arc oxidation coating on Al alloy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

24 Scopus Citations
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Author(s)

  • Shunping Ji
  • Yuchang Weng
  • Zhongzhen Wu
  • Zhengyong Ma
  • Xiubo Tian
  • Ricky K.Y. Fu
  • Hai Lin
  • Guosong Wu
  • Feng Pan

Detail(s)

Original languageEnglish
Pages (from-to)452-459
Journal / PublicationJournal of Alloys and Compounds
Volume710
Publication statusPublished - 5 Jul 2017

Abstract

The corrosion resistance of aluminum and its alloys requires improvement in some applications. In this work, a 20 μm thick compact alumina coating doping Fe and P is obtained on the substrate of LY12 Al alloy by combining micro-arc oxidation (MAO) and phosphating to improve the corrosion resistance. The reaction mechanism is investigated and proposed. The coating shows a relatively small surface roughness (Ra = 0.5 μm) and a high Vickers hardness (1200 HV). The corrosion resistance is evaluated by the salt spraying test and Tafel polarization and a lifetime of up to 1800 h and a passivation potential of above 10 V are observed.

Research Area(s)

  • Aluminum alloy, Corrosion resistance, Micro-arc oxidation, Phosphate

Citation Format(s)

Excellent corrosion resistance of P and Fe modified micro-arc oxidation coating on Al alloy. / Ji, Shunping; Weng, Yuchang; Wu, Zhongzhen; Ma, Zhengyong; Tian, Xiubo; Fu, Ricky K.Y.; Lin, Hai; Wu, Guosong; Chu, Paul K.; Pan, Feng.

In: Journal of Alloys and Compounds, Vol. 710, 05.07.2017, p. 452-459.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal